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l .Vhilbrick 

Solid State 



PHILBRICK produces a wide variety of 
cool, reliable, solid state operational ampli¬ 
fiers to meet the gamut of application 
requirements in measurement, computing, 
control, data processing, and testing. 

The units shown in this chart are the most 
popular types now in production. In 
addition to these, Philbrick is developing 
new and improved types to meet the 
ever-increasing challenges to operational 
amplifier performance. Besides basic 

amplifiers, one can obtain voltage and cur¬ 
rent boosters, regulated dc power 
supplies, non-linear transconductors and op¬ 
erational manifolds from Philbrick. You 
are invited to discuss the application of 
operational amplifiers to the solution 
of your problems with Philbrick or our near¬ 
est Representative. 


BULLETIN 6111 
December 1966 




































PHILBRICK <j> RESEARCHES 




UTILITY-GRADE 

Philbrick Utility-Grade Amplifiers, identified by the 
letter “U” following the family number (e.g.PP85AU), are 
identical to premium-grade prototypes in circuitry, layout, 
manufacturing techniques, and the exclusive use of silicon 
transistors and first-grade passive components from leading 
U. S. manufacturers. 

The substantial price difference between premium and 
utility-grade amplifiers is achieved by the following means: 

The use of silicon transistors encapsulated in highly 
moisture-resistant silicone plastic (Note: not epoxy!) 
instead of hermetically-sealed amplifiers. 

Use of capacitors which are guaranteed from —55 to 
+ 85°C, instead of the —65 to +125°C units normally 
used in Premium-Grade products. 

All room-temperature tests are carried out with the 
thoroughness that has earned Philbrick an enviable 
reputation for reliability; complete temperature tests 
are run on representative samples of each production 
run to confirm compliance with published specifications. 

Use of date codes and go-no-go tests instead of serial 
numbers and recording of data as normally required for 
all premium units (Government Inspection and/or cer¬ 
tified test results are available, upon request, for 
premium units.) 

In performance, the Utility-Grade amplifiers (except 
those in the P2 Series) are identical to their Premium-Grade 
counterparts. As temperature tests are conducted on samples 
only, tolerances outside the 10°-60°C range are relaxed as 
compared with the corresponding specifications for the 
premium amplifier. 

Philbrick Utility-Grade amplifiers may be substituted 
in virtually all applications for which their Premium-Grade 
counterparts are and have been originally recommended. 

CURRENT COMPENSATION 

Philbrick differential operational amplifier families P35 
through P85 contain input stages with matched pairs of 
junction transistors in a common emitter configuration. 
Emitter current being kept constant, each transistor requires 
a “housekeeping” current into its base amounting to emitter 
current divided by p (current gain). By selecting high-/? tran¬ 
sistors and low emitter currents, these base currents can be 
made as small as 10- 8 amperes, but they can never be elim¬ 
inated, and they increase as temperature decreases. If the 
base currents of input transistors are not supplied by current 
sources within the amplifier, an output voltage error will re¬ 
sult because this offset current produces a voltage drop 
across the feed-back impedance (in an inverter) or the signal 
source impedance (in a voltage follower). 

The simplest form of base current supply is a resistor 
from +B to each base. P45A, P55A, P65A and P85A families 
have these built in, while the proper resistance values for 
external installation are marked on their PP equivalents. 
Although these current trim resistors are inexpensive, they 
are most effective within narrow temperature limits and 
where high common-mode voltages do not occur. After all, p, 
and with it base current do change with temperature, and a 
resistor is a constant current source only as long as the 
voltage across it remains constant! 

Philbrick Current Compensated Amplifiers, identified by 
the letter C following the family number, have built-in base 
current sources which closely track current demand over the 
entire operating temperature range. 

The P35C and P85C series contain a sophisticated 
compensating circuit which leaves the outstanding common 
mode voltage rejection ratio, the common mode voltage 
range, and the input impedances unaffected. An additional 
feature of this compensating circuit is a provision for nulling 
either input current completely by applying an adjustable 
voltage bias (±5 volts maximum) to a terminal provided for 
the purpose. The P45C and P65C series contain a simpler 
compensating circuit which provides a fivefold decrease in 
offset current over the entire temperature range, but also 
reduces the common mode rejection ratio, the common 
mode voltage range, and the input impedance. 





























































































































































CHARACTERISTICS 

Typical at + 25°C unless otherwise indicated 

1. VOLTAGE GAIN (DC open loop) 

At +25°C, rated load,.min. 

10 kn load,.min. 

100 kn load,.min. 

At -25°C, rated load,.min. 

At +85°C, rated load,.min. 

2. RESPONSE (open loop, inverting) 

Small signal: Unity gain-bandwidth.min. 

Gain at 1.0 MHz 

Gain at 10 MHz 

Large signal: Full output .min. 

Rate limit 

3. INPUT VOLTAGE RANGE 

Voltage range, both inputs 

Voltage range, between inputs ....abs. max. 
CMRR, DC.min. 

4. INPUT IMPEDANCE 

Between inputs 

Negative input to common 

Positive input to common 

5. INPUT VOLTAGE OFFSET 

Zero adjustment (external) 

Vs Temp. (+ 10°C to +60°C),.max. 

Vs Temp. (—25°C to + 85°C),.max. 

Vs Time (per day) 

Vs Time (Vz hour) 

6. INPUT CURRENT OFFSET 

25°C .max. 

Vs Temp. ( + 10°C to +60°C),.max. 

Vs Temp. (-25°C to +85°C).max. 

Vs Time (per day) 

Vs Time (Vz hour) 

7. INPUT NOISE 

(a) Flicker (0.016 to 1.6 Hz) 

voltage p-p 
current p-p 

(b) Broadband (1.6 to 160 Hz) 

voltage rms 
current rms 

(c) Broadband (0.16 to 16 kHz) 

voltage rms 
current rms 

8. OUTPUT (— 25°C to +85°C) 

Voltage 

Current 

Load (rated) 

9. POWER REQUIREMENTS X 

Voltage 

Current from positive supply: (Quiescent) 

(Full Load) 

Current from negative supply: (Quiescent) 

(Full Load) 

10. TEMPERATURE RANGE (degrees Centigrade) 
Operating: Rated 

Derated specifications .max. 

Storage .max. 

PRICE (quantity 1-4) Price of “Alternate Forms” 
may be slightly different. Prices may change 
without notice. 

ALTERNATE FORMS 

These units belong in the same family as the 
prototype because they have nearly equiva¬ 
lent circuit configurations. They may differ 
significantly from the listed types in electri¬ 
cal or physical characteristics, or applica¬ 
tions considerations. Philbrick Researches 
welcomes your inquiry regarding these and 
other modified forms of standard units. 

UTILITY GRADE 

Where indicated a utility grade equivalent 
denoted by the letter U following the model 
designation, is available at reduced price. 
Utility grade amplifiers have identical per¬ 
formance with their premium grade equiva¬ 
lents in the temperature range 0-60°C. 
Storage temperatures below — 55°C and 
above + 85°C and certified test data are 
not available. 


PP12Q 

Battery operated 

High input impedance 
Low offset current 


PP18Q 

Battery operated 
Differential 


PP25A 

High input impedance 
Low offset current 


Q25AH 

Differential 

Wideband 

Low offset current 


PP35A 

Differential 

High input impedance 

Low voltage offset 


PP35C 

Differential 

Input current compensated 
High input impedance 

Low offset voltage 


PP45 

Ultra wideband 

Large output current 

5,000 


5,000 


40,000 


20,000 


100,000 


100,000 


50,000 

20,000 


20,000 


80,000 


35,000 


200,000 


200,000 


200,000 

30,000 


30,000 


150,000 


80,000 


1,000,000 


1,000,000 


300,000 

2,000 


2,000 


30,000 


15,000 


40,000 


40,000 


20,000 

2,000 


2,000 


60,000 


15,000 


150,000 


150,000 


100,000 

50 kHz 


50 kHz 


1.5 MHz 


30 MHz ▼ 


4 MHz 


4 MHz 


100 MHz 

_ 




2 


40 


6 


6 


140 

_ 




_ 


4 


— 




14 

1 kHz 


1 kHz 


10 kHz 


0.1 MHz 


8 kHz 


8 kHz 


300 kHz 

20 V/ms 


20 V/ms 


0.6 V//i-sec 


8 V/ft-sec 


0.5 V//j.- sec 


0.5 V//n-sec 


200 V/ju-sec 

±0.2 V 


± 0.5 V 


±10 V 


±10 V 


±10 V 


±10 V 


±10 V 

2.7 V 


2.7 V 


30 V 


30 V 


5 V 


5 V 


5 V 

1000:1 


5000:1 


1000:1 


5,000:1 


20,000:1 


20,000:1 


1000:1 

10"n || 6 pF 


0.4 Mn || 6 pF 


10''nil 6pF 


10"n|| 3 pF 


5Mn H 5 pF 


5Mn II 5 pF 


220 kn || 6 pF 

10 12 n ii 6 pF 


15 Mo || 6 pF 


10' 2 n II6 pF 


10 ,2 n|| 6 pF 


2(10»)n|l27 pF 


2(10 9 )nll 27 pF 


33 Mn || 0.01/xF 

10 ,2 n || 6 pF 


15 Mo II 6 pF 


10' 2 n || 6 pF 


10’ 2 n II6 pF 


2(10 9 )nll27 pF 


2(10 9 )nll 27 pF 


33 Mnil 6 pF 

10 kn Rhst. 


10 ko Rhst. 


5 kn Rhst. 


10 kn & 250 kn Pot. 


2.5 kn Pot. 


2.5 kn Pot. 


50 kn Rhst. 

3 mV 


3 mV 


3 mV 


3 mV 


1 mV 


1 mV 


2.5 mV 

6 mV 


6 mV 


6 mV 


6 mV 


3 mV 


3 mV 


6 mV 

50 ,iV 


50 M V 


50 f,V 


50 M V 


25 mV 


25 /xV 


100 ;xV 

10 M V 


10 M V 


10 M V 


10 mV 


10 ^V 


10 /xV 


15 /xV 

• 

-100 pA 


-4-50 nA * 


-150 pA 


-150 pA 


+20 nA 


±4 nA** 


±50 nA* 

1 nA 


200 nA 


1 nA 


1 nA 


20 nA 


4 nA 


150 nA 

10 nA 


440 nA 


10 nA 


10 nA 


45 nA 


10 nA 


300 nA 

3 pA 


5 nA 


3 pA 


3 pA 


1 nA 


1 nA 


30 nA 

1 pA 


0.5 nA 


IpA 


1 pA 


0.1 nA 


0.1 riA 


3 nA 

5 m V 


5 M V 


5,xV 


5 mV 


10 mV 


10 ^V 


5 ^V 

2 pA 


0.25 nA 


2 pA 


2 pA 


0.05 nA 


0.05 nA 


0.5 nA 

2,xV 


1 M V 


2,*V 


2 m V 


10 


10 M V 


1 mV 

3 pA 


30 pA 


1 pA 


IpA 


6 pA 


6 pA 


600 pA 

2 m V 


1 fxV 


2 /aV 


2 /uV 


10 M V 


10 mV 


1 mV 

3 pA 


30 pA 


3 pA 


3 pA 


6 pA 


6 pA 


600 pA 

-4-1 V 


±1 V 


-t-ll V 


±11 V 


±11V 


±11 V 


±10 V 

-4-2 mA 


±2mA 


-4-2.2 mA 


±2.2 mA 


±2.2 mA 


±2.2 mA 


±20 mA 

500 n 


500 o 


5kn 


5 kn 


5 kn 


5 kn. 


500 n 

± 1.35 V 


-4-1.35 V 


±15 V 


±15 V 


±15 V 


±15 V 


±15 V 

0.8 mA 


0.4 mA 


4.6 mA 


6.6 mA 


6 mA 


6 mA 


4 mA 

2.8 mA 


2.4 mA 


4.6 mA 


6.6 mA 


6 mA 


6 mA 


23 mA 

0.8 mA 


0.4 mA 


4.6 mA 


6.6 mA 


6 mA 


6 mA 


4 mA 

2.8 mA 


2.4 mA 


6.8 mA 


8.8 mA 


8.2 mA 

• 


8.2 mA 


23 mA 

-25 to +85 


-25 to +85 


-25 to +85 


-55 to +125 


— 25 to +85 


-25 to +85 


— 25 to +85 

-55 to +100 


-55 to +100 


— 55 to +100 




-55 to +100 


-55 to +100 


-55 to +100 

-62 to +125 


— 62 tp +125 


-62 to +125 


-62 to +150 


-62 to +125 


-62 to +125 


-62 to +125 

$145 


$85 


$135 


$180 


$98 


$118 


$118 

P12Q ■ $145 


P18Q ■ $85 


PP25C and P25C ■ 


P25AH ▼ ■ $154 


PP35A1 and P35A1 ■ 


PP35C1 and P35C1 ■ 


P45A ■ $118 





have input currents ap- 




are units selected for 


are units selected for 







proximately 1/10 of 




less than 1 mV input 


less than 1 mV input 







those given for PP25A 




voltage offset ( — 25°C 


voltage offset f — 25°C 







at any given temper- 




to +85°C). $128 


to +85°C). $128 







ature. $145 




P35A ■ $98 


P35C ■ $118 



\ 

t 




P25A ■ $135 









EP12QU A $108 


EP18QU a $59 


EP25AU A $85 




EP35AU a $60 




EP45AU A $87 

PP12QU $108 

i 

PP18QU $59 


PP25AU $79 




PP35AU $54 




PP45U $89 


SUGGESTED BOOSTER TYPES (used with operational amplifiers for voltage or current boost; connected inside the loop) 

P66A .delivers ±10 V at ±100 mA with external "Boost” resistors connected; ±20 mA without. 

PP66A .delivers same power output as Model P66A. 

P5.delivers ±10 V at ±20 mA; physical companion of P2A. 

0SPB -50/50 delivers ±50 V at ±50 mA with external “Boost” resistors connected; ±10 mA without; has DC gain of 7; 
requires ±60 V supplies. 

0SPB-100/10 delivers ±100 VDC at ±10 mA with external “Boost” resistors connected; ±1.5 mA without; has DC gain of 20; 
requires ±120 VDC supplies. 


Physical Form 
P 

PP 

P2A 

0SP 

0SP 


Price (quantity 1-4) 

$39 

$40 

$48 

$85 

$85 


FLAT-PROFILE PACKAGE 

“FLAT-PROFILE” amplifiers (FP), only 0.4” in height, are available in OEM 
quantities to permit 0.5” printed circuit board spacing. Most "PP” amplifiers 
described above and some boosted models not available in the "PP” package 
may be ordered in the “FP” model. 




















































































































































































































PP45C 

Ultra wideband 

Large output current 
Input current compensated 


PP45L 

Large output current 


PP55A 

Low cost 

Premium 

grade construction 


PP65A 

Versatile 


PP65C 

Versatile 

Input current 
compensated 


PP65AH 

Wideband 

Versatile 


PP75A 

High input impedance 


PP85A 

Differential 

Low voltage offset 


PP85C 

Differential 

Low voltage offsel 
Input current 
compensated 

50 000 


50,000 


20,000 


40,000 


40,000 


40,000 


20,000 


50,000 


50,000 

200 000 


200,000 


40,000 


75,000 


75,000 


75,000 


40,000 


90,000 


90,000 

300 000 


300,000 


60,000 


180,000 


180,000 


180,000 


80,000 


200,000 


200,000 

20 000 


20,000 


10,000 


20,000 


20,000 


20,000 


10,000 


20,000 


20,000 

100^000 


100,000 


30,000 


50,000 


50,000 


50,000 


40,000 


60,000 


60,000 

100 MHz 


1.5 MHz 


1.5 MHz 


1.5 MHz 


1.5 MHz 


20 MHz 


1.5 MHz 


2 MHz 


2 MHz 

140 


2 


3 


3 


3 


25 

3 


3 


3 


3 

14 

300 kHz 


10 kHz 


20 kHz 


20 kHz 


20 .kHz 


75 kHz 


20 kHz 


10 kHz 


10 kHz 

200 V/^-sec 


0.6 V/jtt-sec 


1.5 V//X-sec 


1.5 V//x-sec 


1.5 V//x-sec 


5 V//x-sec 


1.5 V/V-sec 


0.6 V//x-sec 


0.6 V//x-sec 

+5 V 


+10 V 


+ 10 V 


+ 10 V 


+ 5 V 


+ 10 V 


+ 10 V 


+ 11 V 


+ 11 V 

5 V 


5 V 


5 V 


5 V 


5 V 


5 V 


10 V 


5 V 


5 V 

300:1 


1000:1 


1000:1 


1000:1 


300:1 


1000:1 


1000:1 


20 , 000:1 


20 , 000:1 

220 kn|| 6 pF 


220 kQ II 6 pF 


200kQ II 7pF 


300kQ II 6 pF 


300kn || 6 pF 


300kn || 6 pF 


lOMnii 6 pF 


330kQll 6 pF 


330kQ II 6 pF 

15 Mq|| 0.01 m F 


33 Mq II1000 pF 


15Mn II 400pF 


44Mq || 400pF 


22Mq ll 400pF 


44Mn j| 400pF 


500MQII 400pF 


500MQII 6 pF 


500MQII 6 pF 

15 Mall 6 pF 


33 Mq || 6 pF 


15Mq II 8 pF 


44Mq || 6 pF 


22 MQII bpF 


44Mn || 6 pF 


500Mqii 6 pF 


500MQII 6 pF 


500MQII 6 pF 

50 kQ Rhst. 


50 kn Rhst. 


50 kQ Rhst. 


50 kQ Rhst. 


50 kn Rhst. 


50 kn Rhst. 


50 kn Rhst. 


50 kQ Rhst. 


50 kQ Rhst. 

2.5 mV 


2.5 mV 


2 mV 


1.5 mV 


1.5 mV 


1.5 mV 


3 mV 


1 mV 


1 mV 

6 mV 


6 mV 


6 mV 


4 mV 


4 mV 


4 mV 


12 mV 


3 mV 


3 mV 

100 


100 M V 


100 juV 


50 ,xV 


50 ,xV 


50 M V 


100 ,xV 


50 ,xV 


50 ^ 

15 h \l 


15 M V 


25 fxV 


10 ^V 


10 ,xV 


10 . M V 


25 /xV 


10 ,xV 


10 juV 

—i— 50 nA 


+50 nA* 


+50 nA* 


+ 50 nA* 


+50 nA 


+50 nA* 


+ 20 nA 


+ 50 nA* 


+50 nA ** 

50 nA 


150 nA 


300 nA 


150 nA 


50 nA 


150 nA 


20 nA 


150 nA 


50 nA 

150 nA 


300 nA 


600 nA 


300 nA 


100 nA 


300 nA 


60 nA 


300 nA 


100 nA 

30 nA 


30 nA 


30 nA 


10 nA 


10 nA 


10 nA 


1 nA 


5 nA 


5 nA 

3 nA 


3 nA 


3 nA 


1 nA 

. " . 


1 nA 


1 nA 


0.1 nA 


0.5 nA 


0.5 nA 

5 M V 


5 /xV 


15 ,xV 


10 M V 


10 M V 


10 M V 


20 M V 


5 /xV 


5 /xV 

0.5 nA 


0.5 nA 


1 nA 


0.5 nA 


0.5 nA 


0.5 nA 


0.05 nA 


0.25 nA 


0.25 nA 

1 M V 


1 M V 


2 M V 


1 ^ 


1 fxV 


1 M V 


10 /xV 


1 uV 


1 uV 

600 pA 


60 pA 


100 pA 


60 pA 


60 pA 


60 pA 


6 pA 


30 pA 


30 pA 

1 ,xV 


1 ^ 


2 /xV 


1 /aV 


1 ,xV 


1 /xV 


10 ^V 


1 ,xV 


1 uV 

600 pA 


60 pA 


100 pA 


60 pA 


60 pA 


60 pA 


6 pA 


30 pA 


30 pA 

-i-10 V 


+ 10 V 


+ 11 V 


+ 11 V 


+ 11 V 


+ 11 V 


+ 11 V 


+ 11 V 


+ 11 V 

-t -20 mA 


+20 mA 


+2.2 mA 


+2.2 mA 


+2.2 mA 


+ 2.2 mA 


+2.2 mA 


+ 2.2 mA 


+ 2.2 mA 

500 Q 


500 Q 


5 kQ 


5 kn 


5 kn 


5 kn 


5 kQ 


5 kQ 


5 kQ 

+ 15 V 


+ 15 V 


+ 15 V 


+ 15 V 


+ 15 V 


+ 15 V 


+ 15 V 


+ 15 V 


+ 15 V 

4 mA 


4 mA 


5.5 mA 


5.5 mA 


5.5 mA 


5.5 mA 


5.5 mA 


4 mA 


4 mA 

23 mA 


23 mA 


7.7 mA 


7.7 mA 


7.7 mA 


7.7 mA 


7.7 mA 


4 mA 


4 mA 

4 mA 


4 mA 


5.5 mA 


5.5 mA 


5.5 mA 


5.5 mA 


5.5 mA 


4 mA 


4 mA 

23 mA 


23 mA 


5.5 mA 


5.5 mA 


5.5 mA 


5.5 mA 


5.5 mA 


6.2 mA 


6.2 mA 

— 25 to +85 


-25 to +85 


— 25 to +85 


-25 to +85 


-25 to +85 


— 25 to +85 


-25 to +85 


— 25 to +85 


— 25 to +85 

— 55 to +100 


-55 to +100 


-55 to +100 


-55 to +100 


— 55 to +100 


-55 to +100 


— 55 to +100 


-55 to +100 


-55 to +100 

-62 to +125 


-62 to +125 


-62 to +125 


-62 to +125 


-62 to +125 


-62 to +125 


-62 to +125 


-62 to +125 


-62 to +125 

$135 


$95 


$49 


$60 


$75 


$64 


$98 


$60 


$80 

P45C ■ $133 


P45AL ■ $95 


PP55AH and P55AH • 


P65A ■ $65 


PP65CH $79 and 


P65AH ■ $69 


P75A ■ $98 


PP85A1 and P85A1 ■ 


P85C ■ $80 



PP45CL and P45CL ■ 


are stable wide-band 


PP65Q $64 and P65Q1 


P65CH «$84 are wide- 






are units selected for 





have input current off- 


versions. $53 


$69 have +0.9 mA 


band versions 






less than 1 mV input 





sets and common 


P55A • $49 


quiescent battery 


P65C ■ $80 






voltage offset ( — 25°C 





mode parameters iden- 




drain, +0.5 mA full 








to +85°C). $70 and $75 





tical to those of PP45C 




output. 








P85A «$65 





$110 

















EP45ALU A $63 


EP55AU ♦ $19 


EP65AU A $31 




EP65AHU A $35 


P75AU ■ $68 


EP85AU a $ 3 i 





PP45LU $65 


PP55AU $15 


PP65AU $30 




PP65AHU $34 


PP75AU $68 


PP85AU $25 







EP55AHU ♦ $23 


EP65QU A $35 















PP55AHU $19 


PP65QU $34 













F*H I L/EJFtlCK. 
RESEARCHES 

Allied Drive at Route 128, Dedham, Massachusetts 02026 


U.S.A- 




































































































































































































































































Q85AH 


SP2A 


SP65A t 


SP65AH t 



Differential wideband 


Differential 


Stabilized 


Stabilized 



Low voltage offset 


Ultra low offset current 
Floating input 



Wideband 



20,000 


20,000 


lO 2 


102 



40,000 


40,000 


2 x 102 


2 x 102 



80,000 


150,000 


4x 102 


4x102 



15,000 


10,000 (0°C) 


5 x 10* 


5 x 10* 



15,000 


10,000 (65°C) 


4x102 


4x 102 



30 MHz ▼ 


75 kHz 


1.5 MHz 


20 MHz 



50 




3 


-25 



5 


— 


_ 


2.5 



0.1 MHz 


1.1 kHz 


20 kHz 


75 kHz 



8 V//x-sec 


.066 V/m- sec 


1.5 V/M-sec 

• 

5 V/m- sec 



+ 11 V 


+300 V 


+0.1 V 


+0.1 V 



10 V 


15 V 


0.5 V 


0.5 V 



20 , 000:1 


Infinite 


— 


— 



2Mnil 3pF 


10ioa||500 pF 







500Moll 5pF 


10i 2 12|| 5 pF 


1.3M12II 300pF 


1.3Mall 300pF 



500MOII 5pF 


10i 2 a|| 5 pF 


— 


— 



10 ka & 250 ka Pot. 


Built-in 


IMa&lOO ka Pot. 


IMa&lOO ka Pot. 



1 mV 


— 


20 mV (5 mV typ.) 


20 mV (5 mV typ.) 



3 mV 


6 mV (0° to 65°C) 


50 mV (20 mV typ.) 


50 mV (20 mV typ.) 



50 M V 


100 mV 


1 mV 


1 mV 



10 M V 


10 mV 


1 mV 


1 mV 



220 nA 


+ 1 pA 


10 pA 


10 pA 



220 nA 


— 


30 pA 


30 pA 



440 nA 


10 pA (0° to 65°C) 


100 pA 


100 pA 



5 nA 


0.1 pA 


10 pA 


10 pA 



0.5 nA 


0.01 pA 


2 pA 


2 pA 



5 mV 


1 mV 


6 mV 


6 mV 



0.25 nA 


1 fA 


0.1 nA 


0.1 nA 



1 mV 


10 mV p-p 


10 mV p-p 


10 mV p-p 



30 pA 


■ 


— 





1 mV 


10 mV 


1 mV 


1 mV 



30 pA 


500 pA 


60 pA 


60 pA 



+ 11 V 


+ 11V 


+ 11 V 


+ 11 V 



+2.2 mA 


+ 2.2 mA 


+2.2 mA 


+2.2 mA 



5 ka 


5 ka 


5 ka 


5 ka 



+ 15 V 


+ 15 V 


+ 15 V 


+ 15 V 



6 mA 


8 mA 


8 mA 


8 mA 



6 mA 


8 mA 


10 mA 


10 mA 



6 mA 


6 mA 


7 mA 


7 mA 



8.2 mA 


8.2 mA 


7 mA 


7 mA 



-55 to +125 


0 to +65 


-25 to +85 


— 25 to +85 





-25 to +85 


— 45 to +85 


—45 to +85 



-62 to +150 


— 55 to + 85 


— 55 to +85 


— 55 to +85 



$161 


$180 


$180 


$189 



P85AH $98 


P2A $227 is a wire-in 
version of SP2A. It has 









no provision for a driven 
guard SP2B $195 has 

20 mA output current 
capability. SP102 $295 
has +100 V @ 10 mA 
output capability. 









j P2AU a ▲ $130 
SP2AU A A $138 
SP2BU a A $145 






SP6561 

Stabilized 

Large output current 


SP4561 

Stabilized 

Wideband 

Large output current 

5x102 


108 

10 « 


4x108 

2 x 10 ® 


4x108 

2.5 x 102 


5x102 

10 « 


2 xl 0 » 

1.5 MHz 


100 MHz 

3 


140 

— 


14 

20 kHz 


300 kHz 

1.5 V/M-sec 


200 V/M-sec 

+0.1 V 


+0.1 V 

0.5 V 


0.5 V 

1.3 Mall 300pF 


1.3 Ma II O.OImF 

IMa&lOO ka Pot. 


IMa &100 ka Pot. 

20 mV (5 i*V typ.) 


20 mV (5 mV typ.) 

50 mV (20 mV typ.) 


50 mV (20 mV typ.) 

1 mV 


1 mV 

1 mV 


1 mV 

10 pA 


10 pA 

30 pA 


30 pA 

100 pA 


100 pA 

10 pA 


10 pA 

2 pA 


2 pA 

6 mV 


6 mV 

0.1 nA 


0.1 nA 

10 mV p-p 


10 mV p-p 

1 mV 


1 mV 

60 pA 


600 pA 

+ 10V 


+10V 

+20 mA 


+20 mA 

500 a 


500 a 

+ 15 V 


+15 V 

8.75 mA 


5 mA 

28 mA 


24.5 mA 

8.75 mA 


4.5 mA 

28.5 mA 


24 mA 

-25 to +85 


— 25 to +85 

—45 to +85 


-45 to +85 

-55 to +85 


— 55 to + 85 

•$195 


$227 








CHARACTERISTICS 

Typical at +25°C unless otherwise indicated 

1. VOLTAGE GAIN (DC open loop) 

At +25°C, rated load,.min. 

10 ka load.min. 

100 ka load,.min. 

At -25°C, rated load,.min. 

At + 85 C, rated load,.min. 

2. RESPONSE (open loop, inverting) 

Small signal: Unity gain-bandwith.min. 

Gain at 1.0 MHz 

Gain at 10 MHz 

Large signal: Full output .min. 

Rate limit 

3. INPUT VOLTAGE RANGE 

Voltage range, both inputs 

Voltage range, between inputs ....abs. max. 
CMRR, DC.min. 

4. INPUT IMPEDANCE 

Between inputs 

Negative input to common 

Positive input to common 

5. INPUT VOLTAGE OFFSET 

Zero adjustment (external) 

Vs Temp. ( + 10°C to + 60°C),.max. 

Vs Temp. (— 25°C to +85°C),.max. 

Vs Time (per day) 

Vs Time (V 2 hour) 

6 . INPUT CURRENT OFFSET 

25°C .max. 

Vs Temp. ( + 10°C to +60°C).max. 

Vs Temp. ( — 25°C to +85°C).max. 

Vs Time (per day) 

Vs Time (V 2 hour) 

7. INPUT NOISE 

(a) Flicker (0.016 to 1.6 Hz) 

voltage p-p 
current p-p 

(b) Broadband (1.6 to 160 Hz) 

voltage rms 
current rms 

(c) Broadband (0.16 to 16 kHz) 

voltage rms 
current rms 

8 . OUTPUT (-25°C to 4 85°C) 

Voltage 

Current 

Load (rated) 

9. POWER REQUIREMENTS t 

Voltage , 

Current from positive supply: (Quiescent) 

(Full Load) 

Current from negative supply: (Quiescent) 

(Full Load) 

10. TEMPERATURE RANGE (degrees Centigrade) 
Operating: Rated 

Derated specifications .max. 

Storage .max. 

PRICE (quantity 1-4) Price of “Alternate Forms” 
may be slightly different. Prices may change 
without notice. 

ALTERNATE FORMS 

These units belong in the same family as the 
prototype because they have nearly equiva¬ 
lent circuit configurations. They may differ 
significantly from the listed types in electri¬ 
cal or physical characteristics, or applica¬ 
tions considerations. Philbrick Researches 
welcomes your inquiry regarding these and 
other modified forms of standard units. 

UTILITY GRADE 

Where indicated a utility grade equivalent 
denoted by the letter U following the model 
designation, is available at reduced price. 
Utility grade amplifiers have identical per¬ 
formance with their premium grade equiva¬ 
lents in the temperature range 0-60 c C. 
Storage temperatures below — 55°C and 
above +85°C and certified test data are 
not available. 


LEGEND 

M — mega —10 6 
k — kilo —10 3 
m — milli — 10 -3 
fji — micro — 10 6 
/ n —nano — 10 9 
p — pico — 10 12 
f — femto — 10 15 


FOOTNOTES 


■ A plug-in version in bright-metal case having similar performance. Voltage 
offset adjustment built-in. 

♦ A plug-in epoxy version having similar performance. Voltage offset 
adjustment external. 

• A plug-in version in bright-metal case having similar performance. No 
built-in voltage offset adjustment. 

a A plug-in epoxy version having similar performance 
Voltage offset adjustment built-in. 

* With specified external current trim resistors installed. P models have built-in 
current trim resistors. 


** With “Trim I” terminal grounded. Can be trimmed to zero by voltage bias 
(±5 V Max.) applied to “Trim I" terminal. 

▼ Roll-off network connected externally. 

t Specifications shown are for units with mechanical chopper; 6.3 VAC, 50-80 cps 
at 80 mA is required. Units with photochopper are available for operation 
below +65°C. In addition to 6.3 VAC, 50-80 cps, 1 mA, the photochopper 
also requires 115 VAC, 5 mA, at the same frequency and phase. 

$ At + 85°C power requirements will be 10% higher than those stated at +25°C. For 
maximum power requirements at any temperature add ± 10 %. 

a* These utility versions have wider tolerances for voltage offset 
vs temperature, and input current, than premium equivalents. 


S>SC\ 


Hot J) 9/iv/w 




























































































































































































































































































PHILBRICK (j> RESEARCHES 




UTILITY-GRADE 

Philbrick Utility-Grade Amplifiers, identified by the 
letter “U" following the family number (e.g.PP85AU), are 
identical to premium-grade prototypes in circuitry, layout, 
manufacturing techniques, and the exclusive use of silicon 
transistors and first-grade passive components from leading 
U. S. manufacturers. 

The substantial price difference between premium and 
utility-grade amplifiers is achieved by the following means: 

The use of silicon transistors encapsulated in highly 
moisture-resistant silicone plastic (Note: not epoxy!) 
instead of hermetically-sealed amplifiers. 

Use of capacitors which are guaranteed from —55 to 
+ 85°C, instead of the —65 to +125°C units normally 
used in Premium-Grade products. 

All room-temperature tests are carried out with the 
thoroughness that has earned Philbrick an enviable 
reputation for reliability; complete temperature tests 
are run on representative samples of each production 
run to confirm compliance with published specifications. 

Use of date codes and go-no-go tests instead of serial 
numbers and recording of data as normally required for 
all premium units (Government Inspection and/or cer¬ 
tified test results are available, upon request, for 
premium units.) 

In performance, the Utility-Grade amplifiers (except 
those in the P2 Series) are identical to their Premium-Grade 
counterparts. As temperature tests are conducted on samples 
only, tolerances outside the 10°-60°C range are relaxed as 
compared with the corresponding specifications for the 
premium amplifier. 

Philbrick Utility-Grade amplifiers may be substituted 
in virtually all applications for which their Premium-Grade 
counterparts are and have been originally recommended. 

CURRENT COMPENSATION 

Philbrick differential operational amplifier families P35 
through P85 contain input stages with matched pairs of 
junction transistors in a common emitter configuration. 
Emitter current being kept constant, each transistor requires 
a "housekeeping" current into its base amounting to emitter 
current divided by j3 (current gain). By selecting high-/? tran¬ 
sistors and low emitter currents, these base currents can be 
made as small as 1CH 5 amperes, but they can never be elim¬ 
inated, and they increase as temperature decreases. If the 
base currents of input transistors are not supplied by current 
sources within the amplifier, an output voltage error will re¬ 
sult because this offset current produces a voltage drop 
across the feed-back impedance (in an inverter) or the signal 
source impedance (in a voltage follower). 

The simplest form of base current supply is a resistor 
from + B to each base. P45A, P55A, P65A and P85A families 
have these built in, while the proper resistance values for 
external installation are marked on their PP equivalents. 
Although these current trim resistors are inexpensive, they 
are most effective within narrow temperature limits and 
where high common-mode voltages do not occur. After all, j3, 
and with it base current do change with temperature, and a 
resistor is a constant current source only as long as the 
voltage across it remains constant! 

Philbrick Current Compensated Amplifiers, identified by 
the letter C following the family number, have built-in base 
current sources which closely track current demand over the 
entire operating temperature range. 

The P35C and P85C series contain a sophisticated 
compensating circuit which leaves the outstanding common 
mode voltage rejection ratio, the common mode voltage 
range, and the input impedances unaffected. An additional 
feature of this compensating circuit is a provision for nulling 
either input current completely by applying an adjustable 
voltage bias (±5 volts maximum) to a terminal provided for 
the purpose. The P45C and P65C series contain a simpler 
compensating circuit which provides a fivefold decrease in 
offset current over the entire temperature range, but also 
reduces the common mode rejection ratio, the common 
mode voltage range, and the input impedance. 

























































































































































AMPLIFIER TEST CIRCUITS 



OPEN LOOP GAIN 
& OUTPUT CAPABILITY 

DC open loop gain, A, and output capability may be measured 
at 20 Hz. Of chopper stabilized amplifiers, only the main ampli¬ 
fier gain is measured in this manner, overall DC gain being too 
high to measure. For SP2A the gain measurement should be 
carried out at no more than 3 Hz. 

e H 

A = 101 ~^ L 
e v 




VOLTAGE OFFSET 

Voltage offset, e 0 , vs. temperature and/or time may be meas¬ 
ured after the voltage offset central has been adjusted for zero 
output at room temperature. For best accuracy allow the 
amplifier to warm up for 30 minutes before adjusting to zero. 



INPUT CURRENT 


Input currents should be measured after the voltage offset has 
been nulled. If amplifiers have too little input current to be 
measured in this manner (SP2A, P25A, Q25AH, chopper 
stabilized amplifier) the 1M12 resistors should be omitted, and 
the output change timed, i = C de/dt or 1 pA = 10 mV/sec. 


TRACK 


+e v 
1 Mil 


'+ 


~ e v 

1MO. 



R^ioon r 2 =iook 



Alabama 

Huntsville 

205-536-8393 

Illinois 

Chicago 

312-676-1100 

New York 

Buffalo 

716-835-6186 

Texas 

Dallas 

214-526-8316 

Arizona 

Phoenix 

602-265-3629 



312-676-1101 


Syracuse 

315-446-0220 


Houston 

713-781-1441 

California 

Los Angeles 

213-937-0780 

Indiana 

Indianapolis 

317-356-4249 


Valley Stream 

516-561-7791 

Utah 

Salt Lake City 

801-466-4924 


Mountain View 

415-969-9020 

Louisiana 

New Orleans 

504-242-5575 

North Carolina 

Winston-Salem 

919-725-5384 

Virginia 

Alexandria 

703-836-1800 


San Diego 

714-222-1121 

Maryland 

Baltimore 

301-727-1999 



919-725-5385 


Newport News 

703-245-8272 

Colorado 

Denver 

303-733-3701 

Massachusetts 

Wakefield 

617-245-5100 

Ohio 

Dayton 

513-298-9964 

Washington 

Seattle 

206-723-3320 

Connecticut 

Hartford 

203-233-5503 

Michigan 

Detroit 

313-838-7324 


Westlake 

216-871-8000 

New York (Export) New York 

212-246-2133 


Greenwich 

203-661-5140 

Minnesota 

Minneapolis 

612-545-4481 

Oklahoma 

Tulsa 

918-627-6199 




Florida 

Ft. Lauderdale 

305-564-8000 

Missouri 

St. Louis 

314-831-0015 

Pennsylvania 

Philadelphia 

215-277-0559 

Canada 

Quebec — Montreal 

514-482-9750 


Ft. Walton Beach 

904-243-6424 

New Mexico 

Albuquerque 

505-268-3941 


Pittsburgh 

412-371-1231 


Ontario — Toronto 

416-789-4325 


Orlando 305-425-5505 

Georgia Atlanta 404-939-1674